A source close to the couple told gossip website TMZ.com that the pair were taken straight into the delivery room after arriving at the hospital at 6am on Tuesday morning. The insider said they arrived alone, without any family members or assistants.

The pair, were last pictured in public together over the weekend when they took their two dogs for a walk in a Hollywood park, while in the lead up to the birth Mila was regularly seen attending pre-natal yoga classes.

Speaking about what she wanted her kids to be like, Mila recently told Marie Claire magazine: "I just don't want my kids to be a**holes. I feel like so many kids nowadays.

"Both of us just want to have well behaved honest, nice children who people meet and say, 'That's a good kid.'"